If you recall, it was mere days ago when the Biebs threatened to make his account private if people didn't stop posting nasty comments. Then to everyone's surprise, ex-girlfriend Selena Gomez stepped in to defend Justin's fans, telling him not to be mad at them and that "they were there for you before anyone." To be fair, we might assume that Selena was talking about the fans who were supportive of his new relationship, not the ones trash-talking him and Sofia. TLDR; Justin said he loves his fans and that he wants everyone to be kind to each other.

As far as public posts are concerned, that's where the argument ended, until Justin made the final move.